The T's in my 1982 booster line were open (large holes).
The T's in my 1983 booster line were restricted.
When I ordered replacements, both lines sent had T's with the larger holes.

The only reason for having orifices of smaller size in the T's would be to increase vacuum to the brake booster, but as long as your system is tight enough to maintain ~25" to the booster, all is well.

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1982 300CD Petrol/Black Leather